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Generic XF86Config File?

I am not a Linux guru. Having said that... I  often get people coming to me with their Linux problems. One problem that I encounter a lot is people being unable to start X. They can get a command line but no more. Typing startx just results in some kind of error.

So my question is, is there any kind of default or generic  XF86Config file that I could maybe carry on my thumbdrive for emergencys like that? Maybe a XF86Config file that would at least allow a person to boot into VGA mode?

Obviously I don't know much about Linux. What is leading me down this train of thought is the fact that if WIndows does not have the correct video driver you can always still boot into VGA mode. And I was wondering if there was some kind of similar functionality in Linux.
2 Solutions
Check those 3 portions in XF86Config (or xorg.conf).
Section "Monitor"

Identifier "Generic Multisync"
VendorName "Unknown"
ModelName "Unknown"
HorizSync 30-64
VertRefresh 50-85


Section "Device"
Identifier "Generic VGA"
VendorName "Unknown"
BoardName "Unknown"
Chipset "generic"


Section "Screen"
Driver "svga"
Device "Generic VGA"
Monitor "Generic Multisync"
Subsection "Display"
Modes "640x480"
ViewPort 0 0
Virtual 800 600

However, this configuration may not work all the time since some video card are picky on the driver and the setting.
"similar" functionality is not starting X att all and not having vesafb console, so you can fix everything.

X -configure usually generates usable config file then

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